assign_by_regex: Assign to vector only where regular expression is matched

In roperators: Additional Operators to Help you Write Cleaner R Code

Description

This takes two arguments just like gsub - a patterns and a replacement. It will totally overwrite any element where the pattern is matched with the second. If you want to simply apply a regex (i.e. replace only the specific bit that matches), use %regex=% instead. If you want to replace with nothing (""), just just %-% or %-=% instead.

Usage

x %regex<-% value

Arguments

x	a character vector
value	c(pattern, replacement)

Author(s)

Ben Wiseman, [e-mail]

Examples

# Overwrite elements that match regex:

 x <- c("a1b", "b1", "c", "d0")

 # overwrite any element containing a number

 x %regex<-% c("\\d+", "x")

 print(x)

 # "x" "b" "c" "x"

roperators documentation built on Feb. 10, 2022, 1:07 a.m.